Believe it or not an egg must be turned at least 2-3 times per day to prevent the embryo from sticking to the side of the shell. This is accomplished by turning the eggs by hand or by an automatic egg turner. Automatic egg turners work by rocking or rolling the eggs to keep the embryo from sticking to the shell. A very slow RPM motor is used to automate the egg turner.

An incubator thermostat is the most critical component inside an egg incubator. Finding the right thermostat can be very difficult. There are several types of incubator thermostats: Bi-metal Incubator Thermostat (sometimes called a incubator wafer thermostat), On/Off Electronic Incubator Thermostat, & Proportional Incubator Thermostat. The best type of incubator thermostat is the Proportional Incubator Thermostat because it keeps a more constant temperature by turning the power to the heater up or down instead of turning it on and off. Bi-Metal & Electronic on/off incubator thermostats can work very well, but they require the correct amount of heater wattage to avoid excess overshooting or undershooting of the incubator thermostat set-point.